Journal ArticleDOI
Optimization of a solar‐driven heat engine
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TLDR
In this paper, the optimum performance of the solar-driven heat engine consisting of a solar collector and a heat engine is investigated, based on the linear heat loss model of solar collectors and the endoreversible Carnot cycle model of heat engines.Abstract:
The optimum performance of the solar‐driven heat engine consisting of a solar collector and a heat engine is investigated, based on the linear heat‐loss model of solar collectors and the endoreversible Carnot cycle model of heat engines. Some new results such as the optimum operating temperature of the solar collector, the maximum overall efficiency of the system, the optimum operating temperatures of the working fluid in two isothermal heat exchange processes of the heat engine, and so on, are derived. It is expounded that these results have more realistic meaning than the previous relative theoretics for the optimum design of practical solar‐driven heat engine systems.read more
Citations
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Finite Time Thermodynamic Optimization or Entropy Generation Minimization of Energy Systems
Lingen Chen,Chih Wu,Fengrui Sun +2 more
TL;DR: In this article, the authors reviewed the state-of-the-art of finite time thermodynamic theory and applications from the point of view of both physics and engineering, focusing on the performance optimization of thermodynamic processes and devices with finite-time and/or finite-size constraints.
Journal ArticleDOI
The maximum power output and maximum efficiency of an irreversible Carnot heat engine
TL;DR: In this paper, the effect of thermal resistance, heat leakage and internal irreversibility resulting from the working fluid on the performance of a Carnot heat engine was investigated using a new cyclic model.
Journal ArticleDOI
Designing a solar powered Stirling heat engine based on multiple criteria: Maximized thermal efficiency and power
TL;DR: In this article, a solar-powered high temperature differential Stirling engine was considered for optimization using multiple criteria, including the output power and overall thermal efficiency, and the Pareto optimal frontier was obtained and a final optimal solution was also selected using various decision-making methods.
Journal ArticleDOI
Thermodynamic analysis and multi objective optimization of performance of solar dish Stirling engine by the centrality of entransy and entropy generation
TL;DR: In this paper, a multi-objective optimization on the solar-powered Stirling engine with high temperature differential was proposed based on the finite-time thermodynamic model and three well known decision making methods have been employed to specify the optimum values of the above mentioned parameters.
Journal ArticleDOI
Thermodynamic analysis of a solar‐driven thermoelectric generator
TL;DR: In this paper, a thermodynamic model including four irreversibilities is used to investigate the optimal performance of a solar-driven thermoelectric generator, and the efficiency of the system is derived and taken as an objective function for optimization.
References
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Journal ArticleDOI
Efficiency of a Carnot engine at maximum power output
F. L. Curzon,B. Ahlborn +1 more
TL;DR: In this article, the efficiency of a Carnot engine for the case where the power output is limited by the rates of heat transfer to and from the working substance was analyzed, and it was shown that the efficiency at maximum power output was given by the expression η = 1 − (T2/T1)1/2 where T1 and T2 are the respective temperatures of the heat source and heat sink.
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Optimal configuration of a class of irreversible heat engines. I
TL;DR: In this article, the same authors reanalyze the same class of irreversible cyclic heat engines, treating the thermodynamic variables of the working fluid as dynamical variables, and obtain the optimal configuration of the engine when the performance goal is to maximize the average power output per cycle or, alternatively, maximize the efficiency of the engines.
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Efficiency of some heat engines at maximum-power conditions
TL;DR: In this article, a simple model is presented for a heat engine, where the power output is limited by the rate of heat supply (and/or heat release) and the model leads to a variety of results such as the Carnot law, the Curzon-Ahlborn efficiency, and the Castans efficiency.
Journal ArticleDOI
Optimal staging of endoreversible heat engines
Morton H. Rubin,Bjarne Andresen +1 more
TL;DR: In this article, the authors investigated the performance of two endoreversible engines (i.e., heat engines with the only irreversibility being heat resistance to the surroundings) which are put in series to form a single engine, whose power output is maximized.
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The generalized Carnot cycle: A working fluid operating in finite time between finite heat sources and sinks
TL;DR: In this paper, the authors derived the maximum work obtainable in finite time from such a system, and found that strongly dependent upon the reservoir heat capacity, the efficiency (work produced/heat put in) is a strictly decreasing function of the reservoir's heat capacity.